Salix rotundifolia Trautv.

vernacular least willow — species · Salicaceae

USDA: SARO2
GBIF: 5372935
Rank: species

least willow (Salix rotundifolia) — Platephotograph · Abi WoodbridgeCC BY-NC source · iNaturalist ↗

§2Habit & range

Growth habit: Shrub, Subshrub
Duration: Perennial
Group: Dicot
Family: Salicaceae Mirb.
Genus: Salix

§2a

Native status, by region

AK Alaska Native
CAN Canada Native
L48 Lower 48 States Native

§2b

County-level range

· 2 counties across 1 state

Legend Native · 2 Introduced · 0 Both · 0 Hover a county for detail.

§3Cultivation specs · USDA

Recorded by the USDA Plant Materials Program.

§3a

Tolerances

Drought: Low
Fire: Medium
Salinity: None
Anaerobic: Medium
Hedging: Low

§3b

Climate & soil

Cold tolerance: -30 °F minimum
Frost-free days: 120 min.
Precipitation: 10–59 in/yr
pH range: 5.5–7.5
Root depth: 12 in min.
Fertility need: Low
Soil texture: coarse, medium

§3c

Form & growth

Growth rate: Moderate
Lifespan: Short
Mature height: 0.2 ft
Height @ 20 y: 0 ft
Foliage texture: Coarse
Foliage colour: Green
Flower colour: Purple
Fire resistant: No
N fixation: None
Toxicity: Slight

§3d

Reproduction

Bloom period: Spring
Seed abundance: High
Spread rate: Rapid
Stratify: No
Propagation: seed, cuttings, sprigs

§3e

Use & availability

Nursery stock: No
Palatable, human: No
Lumber: No
Fuelwood: Low
Christmas tree: No

§4Counties, by state

Recorded in 2 counties across 1 state.

Montana view state ↗ 2 N ▾

§5Sources & provenance

USDA PLANTS

Symbol, taxonomy, distribution, cultivation specs, native status. Public domain.

plants.usda.gov/SARO2 ↗

GBIF Backbone

Canonical taxonomic identity, synonym resolution, cross-refs. CC0.

gbif.org/species/5372935 ↗

Record version

Cached and built locally. Source version on this record:

usda-plants-mt-2026-05-25

fetched 2026-05-25T18:27:19Z